I have a Gravely ZT2048 with a fairly new 26 hp Briggs. I have tried everything from blades, removing baffles, mowing slower, and I can't for the life of me figure out why this thing leaves grass standing! It doesn't matter if I mow in a straight line or turn sharp....it always leaves grass standing. Im almost certain the belt isnt slipping because it's fairly new and pretty tight. I never hear the blade roar slow down either. If its pretty thinned out grass and not very tall it doesn't miss much but anything fairly thick or over 7 or 8 inches, I have to mow most of the yard twice! Any input would be great!